Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of s=8 TeV is presented. The results are based on an integrated luminosity of 20.2 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|<1.37 or 1.56<|ηγ|<2.37 and transverse energies of respectively ET,1γ>40 GeV and ET,2γ>30 GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is 16.8±0.8 pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%. © 2017 CERN.

Registro:

Documento: Artículo
Título:Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at √ s = 8 TeV with the ATLAS detector
Autor:Aaboud, M. et al.
Este artículo contiene 2857 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2857 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2017
Volumen:95
Número:11
DOI: http://dx.doi.org/10.1103/PhysRevD.95.112005
Título revista:Physical Review D
Título revista abreviado:Phy. Rev. D
ISSN:24700010
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24700010_v95_n11_p_Aaboud

Referencias:

  • Abazov, V.M., Measurement of the differential cross sections for isolated direct photon pair production in (Equation presented) collisions at (Equation presented) (2013) Phys. Lett. B, 725, p. 6. , (D0 Collaboration)
  • Aaltonen, T., Measurement of the Cross Section for Prompt Isolated Diphoton Production Using the Full CDF Run II Data Sample (2013) Phys. Rev. Lett., 110, p. 101801. , (CDF Collaboration)
  • Measurement of the isolated diphoton cross-section in (Equation presented) collisions at (Equation presented) with the ATLAS detector (2012) Phys. Rev. D, 85, p. 012003. , ATLAS Collaboration
  • Measurement of isolated-photon pair production in (Equation presented) collisions at (Equation presented) with the ATLAS detector J. High Energy Phys., 2013 (1), p. 086. , ATLAS Collaboration
  • Measurement of the production cross section for pairs of isolated photons in (Equation presented) collisions at (Equation presented) J. High Energy Phys., 2012 (1), p. 133. , CMS Collaboration
  • Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at (Equation presented) (2014) Eur. Phys. J. C, 74, p. 3129. , CMS Collaboration
  • Measurement of Higgs boson production in the diphoton decay channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector (2014) Phys. Rev. D, 90, p. 112015. , ATLAS Collaboration
  • Observation of the diphoton decay of the Higgs boson and measurement of its properties (2014) Eur. Phys. J. C, 74, p. 3076. , CMS Collaboration
  • Search for resonances in diphoton events at (Equation presented) with the ATLAS detector J. High Energy Phys., 2016 (9), p. 001. , ATLAS Collaboration
  • Search for Resonant Production of High-Mass Photon Pairs in Proton-Proton Collisions at (Equation presented) and 13 TeV (2016) Phys. Rev. Lett., 117, p. 051802. , CMS Collaboration
  • Binoth, T., Guillet, J.P., Pilon, E., Werlen, M., A Full next-to-leading order study of direct photon pair production in hadronic collisions (2000) Eur. Phys. J. C, 16, p. 311
  • Catani, S., Cieri, L., De Florian, D., Ferrera, G., Grazzini, M., Diphoton Production at Hadron Colliders: A Fully Differential QCD Calculation at NNLO (2012) Phys. Rev. Lett., 108, p. 072001. , we thank Leandro Cieri for his help in the generation of theoretical predictions using the (Equation presented) nnlo calculation
  • Campbell, J.M., Ellis, R.K., Li, Y., Williams, C., Predictions for diphoton production at the LHC through NNLO in QCD J. High Energy Phys., 2016 (7), p. 148
  • Ladinsky, G.A., Yuan, C.P., The Nonperturbative regime in QCD resummation for gauge boson production at hadron colliders (1994) Phys. Rev. D, 50, p. R4239
  • Balaza, C., Berger, E., Nadolsky, P., Yuan, C.-P., All-orders resummation for diphoton production at hadron colliders (2006) Phys. Lett. B, 637, p. 235
  • Balaza, C., Berger, E., Nadolsky, P., Yuan, C.-P., Calculation of prompt diphoton production cross sections at Tevatron and LHC energies (2007) Phys. Rev. D, 76, p. 013009
  • Nadolsky, P., Balaza, C., Berger, E., Yuan, C.-P., Gluon-gluon contributions to the production of continuum diphoton pairs at hadron colliders (2007) Phys. Rev. D, 76, p. 013008
  • Cieri, L., Coradeschi, F., De Florian, D., Diphoton production at hadron colliders: Transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy J. High Energy Phys., 2015 (6), p. 185
  • Vesterinen, M., Wyatt, T., A novel technique for studying (Equation presented) boson transverse momentum distribution at hadron colliders (2009) Nucl. Instrum. Methods Phys. Res., Sect. A, 602, p. 432
  • Banfi, A., Redford, S., Vesterinen, M., Waller, P., Wyatt, T., Optimisation of variables for studying dilepton transverse momentum distributions at hadron colliders (2011) Eur. Phys. J. C, 71, p. 1600
  • Collins, J.C., Soper, D.E., Angular distribution of dileptons in high-energy hadron collisions (1977) Phys. Rev. D, 16, p. 2219
  • Abazov, V.M., Precise Study of the (Equation presented) Boson Transverse Momentum Distribution in (Equation presented) Collisions Using a Novel Technique (2011) Phys. Rev. Lett., 106, p. 122001. , (D0 Collaboration)
  • Abazov, V.M., Measurement of the (Equation presented) distribution of muon pairs with masses between 30 and 500 GeV in (Equation presented) of (Equation presented) collisions (2015) Phys. Rev. D, 91, p. 072002. , (D0 Collaboration)
  • Measurement of the transverse momentum and (Equation presented) distributions of Drell-Yan lepton pairs in proton-proton collisions at (Equation presented) with the ATLAS detector (2016) Eur. Phys. J. C, 76, p. 291. , ATLAS Collaboration
  • Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at (Equation presented) with ATLAS J. High Energy Phys., 2014 (9), p. 112. , ATLAS Collaboration
  • The ATLAS Experiment at the CERN Large Hadron Collider (2008) J. Instrum., 3, p. S08003. , ATLAS Collaboration
  • Performance of the ATLAS Trigger System in 2010 (2012) Eur. Phys. J. C, 72, p. 1849. , ATLAS Collaboration
  • (2012) Performance of the ATLAS Electron and Photon Trigger in P-p Collisions at (Equation Presented) in 2011, , https://cds.cern.ch/record/1450089, ATLAS Collaboration, Report No. ATLAS-CONF-2012-048
  • Luminosity determination in pp collisions at (Equation presented) using the ATLAS detector at the LHC (2016) Eur. Phys. J. C, 76, p. 653. , ATLAS Collaboration
  • Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data (2016) Eur. Phys. J. C, 76, p. 666. , ATLAS Collaboration
  • Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data (2014) Eur. Phys. J. C, 74, p. 3071. , ATLAS Collaboration
  • Combined Measurement of the Higgs Boson Mass in (Equation presented) Collisions at (Equation presented) and 8 TeV with the ATLAS and CMS Experiments (2015) Phys. Rev. Lett., 114, p. 191803. , ATLAS and CMS Collaborations
  • Topological Cell Clustering in the ATLAS Calorimeters and Its Performance in LHC Run 1, (2016), , ATLAS Collaboration, arXiv:1603.02934
  • Cacciari, M., Salam, G.P., Sapeta, S., On the characterisation of the underlying event J. High Energy Phys., 2010 (4), p. 065
  • Measurement of the inclusive isolated prompt photon cross section in (Equation presented) collisions at (Equation presented) with the ATLAS detector (2011) Phys. Rev. D, 83, p. 052005. , ATLAS Collaboration
  • Gleisberg, T., Höche, S., Krauss, F., Schönherr, M., Schumann, S., Siegert, F., Winter, J., Event generation with sherpa 1.1 J. High Energy Phys., 2009 (2), p. 007
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., A brief introduction to pythia 8.1 (2008) Comput. Phys. Commun., 178, p. 852
  • Nason, P., A new method for combining NLO QCD with shower Monte Carlo algorithms J. High Energy Phys., 2004 (11), p. 040
  • Frixione, S., Nason, P., Oleari, C., Matching NLO QCD computations with Parton Shower simulations: The POWHEG method J. High Energy Phys., 2007 (11), p. 070
  • Alioli, S., Nason, P., Oleari, C., Re, E., A general framework for implementing NLO calculations in shower Monte Carlo programs: The POWHEG BOX J. High Energy Phys., 2010 (6), p. 043
  • Lai, H.-L., Guzzi, M., Huston, J., Li, Z., Nadolsky, P.M., Pumplin, J., Yuan, C.-P., New parton distributions for collider physics (2010) Phys. Rev. D, 82, p. 074024
  • Schumann, S., Krauss, F., A Parton shower algorithm based on Catani-Seymour dipole factorisation J. High Energy Phys., 2008 (3), p. 038
  • Hoeche, S., Krauss, F., Schumann, S., Siegert, F., QCD matrix elements and truncated showers J. High Energy Phys., 2009 (5), p. 053
  • Siegert, F., A practical guide to event generation for prompt photon production with Sherpa (2017) J. Phys. G, 44, p. 044007
  • Pumplin, J., Stump, D.R., Huston, J., Lai, H.-L., Nadolsky, P., Tung, W.-K., New generation of parton distributions with uncertainties from global QCD analysis J. High Energy Phys., 2002 (7), p. 012
  • Golonka, P., Was, Z., PHOTOS Monte Carlo: A precision tool for QED corrections in (Equation presented) and (Equation presented) decays (2006) Eur. Phys. J. C, 45, p. 97
  • ATL-PHYS-PUB-2012-003, 2012, , https://cds.cern.ch/record/1474107, ATLAS Collaboration
  • The ATLAS simulation infrastructure (2010) Eur. Phys. J. C, 70, p. 823. , ATLAS Collaboration
  • Agostinelli, S., Geant 4: A simulation toolkit (2003) Nucl. Instrum. Methods Phys. Res., Sect. A, 506, p. 250
  • Measurement of the inclusive isolated prompt photon cross section in (Equation presented) collisions at (Equation presented) with the ATLAS detector (2011) Phys. Rev. D, 83, p. 052005. , ATLAS Collaboration
  • Cranmer, K.S., Kernel estimation in high-energy physics (2001) Comput. Phys. Commun., 136, p. 198
  • D'Agostini, G., A multidimensional unfolding method based on Bayes' theorem (1995) Nucl. Instrum. Methods Phys. Res., Sect. A, 362, p. 487
  • Adye, T., Unfolding Algorithms and Tests Using RooUnfold, , arXiv:1105.1160
  • https://hepdata.net, A complete set of tables with the full results are available at the Durham HepData repository; Frixione, S., Isolated photons in perturbative QCD (1998) Phys. Lett. B, 429, p. 369
  • Andersen, J.R., Les Houches 2013: Physics at TeV Colliders: Standard Model Working Group Report, , arXiv:1405.1067
  • Cieri, L., Diphoton Isolation Studies, , arXiv:1510.06873
  • Krauss, F., Kuhn, R., Soff, G., AMEGIC++ 1.0: A matrix element generator in C++ J. High Energy Phys., 2 (2), p. 044
  • Cascioli, F., Maierhöfer, P., Pozzorini, S., Scattering Amplitudes with Open Loops (2012) Phys. Rev. Lett., 108, p. 111601
  • Höche, S., Krauss, F., Schönherr, M., Siegert, F., QCD matrix (Equation presented): The NLO case J. High Energy Phys., 2013 (4), p. 027
  • Ball, R.D., Parton distributions for the LHC Run II J. High Energy Phys., 2015 (4), p. 040. , (NNPDF Collaboration)
  • Binoth, T., Guillet, J.P., Pilon, E., Werlen, M., Beyond leading order effects in photon pair production at the Tevatron (2001) Phys. Rev. D, 63, p. 114016
  • ATL-GEN-PUB-2016-002, 2016, , https://cds.cern.ch/record/2202407, ATLAS Collaboration

Citas:

---------- APA ----------
(2017) . Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at √ s = 8 TeV with the ATLAS detector. Physical Review D, 95(11).
http://dx.doi.org/10.1103/PhysRevD.95.112005
---------- CHICAGO ----------
Aaboud, M. "Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at √ s = 8 TeV with the ATLAS detector" . Physical Review D 95, no. 11 (2017).
http://dx.doi.org/10.1103/PhysRevD.95.112005
---------- MLA ----------
Aaboud, M. "Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at √ s = 8 TeV with the ATLAS detector" . Physical Review D, vol. 95, no. 11, 2017.
http://dx.doi.org/10.1103/PhysRevD.95.112005
---------- VANCOUVER ----------
Aaboud, M. Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at √ s = 8 TeV with the ATLAS detector. Phy. Rev. D. 2017;95(11).
http://dx.doi.org/10.1103/PhysRevD.95.112005